| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1960 | 85984 | 105780 | 54592 | 28004 | 25157 | 13992 | 9875 | 6723 | 3462 | 13100 |
| 1961 | 112065 | 58240 | 70869 | 30583 | 17087 | 15273 | 8740 | 6543 | 4652 | 11526 |
| 1962 | 212243 | 67346 | 37728 | 46092 | 19133 | 12504 | 10860 | 6098 | 4799 | 12009 |
| 1963 | 291690 | 136025 | 39238 | 26516 | 29972 | 12381 | 9755 | 7750 | 4427 | 12438 |
| 1964 | 75514 | 201765 | 79552 | 23446 | 18579 | 20117 | 8514 | 7350 | 5600 | 12335 |
| 1965 | 272846 | 48628 | 117345 | 46844 | 15542 | 12467 | 13453 | 5462 | 5020 | 12332 |
| 1966 | 131302 | 192885 | 34440 | 65939 | 27610 | 10333 | 8293 | 8277 | 3590 | 11592 |
| 1967 | 175324 | 82766 | 116148 | 20314 | 38334 | 16949 | 7289 | 5936 | 5434 | 10060 |
| 1968 | 140709 | 117677 | 47397 | 67139 | 13273 | 25039 | 10651 | 4984 | 3937 | 9867 |
| 1969 | 279264 | 87355 | 80998 | 32032 | 44579 | 10925 | 18436 | 7304 | 3456 | 9265 |
| 1970 | 227320 | 173400 | 57845 | 54782 | 22643 | 31389 | 9223 | 14209 | 5248 | 9065 |
| 1971 | 238450 | 146391 | 89120 | 35345 | 32636 | 14426 | 18746 | 6434 | 9140 | 9079 |
| 1972 | 150777 | 142261 | 87464 | 47649 | 23126 | 19480 | 9719 | 11338 | 4154 | 11337 |
| 1973 | 204417 | 78367 | 81272 | 53229 | 28646 | 15630 | 12542 | 6879 | 7232 | 9894 |
| 1974 | 93948 | 111275 | 41242 | 47352 | 33260 | 17352 | 10404 | 7977 | 4276 | 10376 |
| 1975 | 167068 | 41350 | 53146 | 19530 | 24352 | 17896 | 9655 | 6072 | 4446 | 7940 |
| 1976 | 226183 | 73792 | 18734 | 26152 | 10369 | 11730 | 8666 | 4956 | 3085 | 6185 |
| 1977 | 206998 | 88661 | 30532 | 8192 | 13607 | 5305 | 5939 | 4243 | 2502 | 4645 |
| 1978 | 132743 | 88337 | 37719 | 14723 | 4465 | 7385 | 3020 | 3267 | 2351 | 4023 |
| 1979 | 200579 | 58235 | 38735 | 16801 | 7562 | 2259 | 4068 | 1599 | 1687 | 3367 |
| 1980 | 114322 | 95449 | 23046 | 16650 | 8211 | 3476 | 1033 | 2058 | 814 | 2553 |
| 1981 | 249348 | 55843 | 44680 | 9876 | 8240 | 4184 | 1720 | 612 | 1091 | 1785 |
| 1982 | 123860 | 133342 | 24042 | 19604 | 4570 | 4290 | 2012 | 922 | 330 | 1555 |
| 1983 | 95669 | 66316 | 58057 | 9541 | 9316 | 2501 | 2418 | 1061 | 516 | 1082 |
| 1984 | 88488 | 56215 | 30070 | 22851 | 4164 | 4633 | 1237 | 1288 | 567 | 853 |
| 1985 | 98847 | 39748 | 22279 | 12571 | 8378 | 1898 | 2152 | 523 | 593 | 665 |
| 1986 | 180848 | 47425 | 16986 | 10757 | 5891 | 3289 | 938 | 1021 | 251 | 594 |
| 1987 | 147302 | 133120 | 22360 | 8203 | 5357 | 2702 | 1376 | 470 | 472 | 410 |
| 1988 | 75227 | 105118 | 77769 | 11541 | 3527 | 2040 | 1327 | 516 | 202 | 358 |
| 1989 | 71401 | 52742 | 58004 | 39005 | 4954 | 1127 | 747 | 550 | 170 | 238 |
| 1990 | 81148 | 44720 | 28124 | 27085 | 17881 | 2381 | 535 | 385 | 294 | 218 |
| 1991 | 237844 | 45595 | 20810 | 14522 | 11761 | 7898 | 1222 | 260 | 205 | 271 |
| 1992 | 313892 | 146654 | 21444 | 10545 | 7623 | 5516 | 4244 | 656 | 142 | 269 |
| 1993 | 226571 | 231882 | 78971 | 10000 | 4251 | 3104 | 2315 | 2028 | 297 | 188 |
| 1994 | 158778 | 172131 | 142945 | 38680 | 4263 | 1699 | 1451 | 969 | 995 | 233 |
| 1995 | 300716 | 137841 | 117779 | 81888 | 16342 | 1808 | 801 | 764 | 458 | 639 |
| 1996 | 155893 | 256193 | 89423 | 70818 | 43870 | 8288 | 990 | 487 | 433 | 637 |
| 1997 | 182861 | 116176 | 181520 | 57130 | 41300 | 23194 | 4331 | 467 | 261 | 583 |
| 1998 | 103552 | 143284 | 80618 | 126478 | 33320 | 24812 | 14026 | 2722 | 295 | 543 |
| 1999 | 250242 | 81307 | 100286 | 52263 | 74963 | 19223 | 15734 | 8696 | 1648 | 520 |
| 2000 | 158619 | 200025 | 55016 | 59748 | 31192 | 42501 | 12192 | 10164 | 5226 | 1303 |
| 2001 | 207415 | 108309 | 146349 | 39002 | 36400 | 19255 | 25766 | 7946 | 6396 | 4006 |
| 2002 | 327532 | 173694 | 77606 | 99200 | 26980 | 23259 | 12804 | 16272 | 5039 | 6630 |
| 2003 | 144484 | 283664 | 118987 | 51592 | 60857 | 19031 | 15048 | 8638 | 10122 | 7311 |
| 2004 | 129119 | 120657 | 184180 | 81762 | 35914 | 39537 | 12104 | 9397 | 5351 | 10418 |
| 2005 | 470212 | 108104 | 77352 | 116580 | 55646 | 24684 | 24857 | 7684 | 5394 | 9086 |
| 2006 | 64639 | 354492 | 75889 | 46598 | 72210 | 34688 | 15650 | 14348 | 4380 | 7990 |
| 2007 | 88192 | 50051 | 211276 | 50198 | 28910 | 40919 | 20230 | 9038 | 7569 | 6310 |
| 2008 | 233176 | 65190 | 36790 | 112693 | 29936 | 16315 | 21187 | 10924 | 4637 | 6926 |
| 2009 | 122252 | 167628 | 40253 | 24573 | 60619 | 15912 | 7973 | 10366 | 5357 | 5506 |
| 2010 | 286139 | 86141 | 95085 | 26354 | 13762 | 33225 | 8074 | 3906 | 4999 | 5265 |
| 2011 | 117449 | 214661 | 45212 | 48680 | 15508 | 7925 | 16344 | 4137 | 1938 | 4953 |
| 2012 | 135670 | 96834 | 126768 | 29357 | 24733 | 8771 | 4214 | 8009 | 2043 | 3388 |
| 2013 | 244308 | 77902 | 67610 | 77931 | 17382 | 12691 | 4650 | 2262 | 4097 | 2787 |
| 2014 | 103793 | 191187 | 51767 | 43185 | 45284 | 10445 | 6962 | 2766 | 1281 | 3874 |
| 2015 | 158170 | 76690 | 126628 | 36659 | 27157 | 25951 | 6056 | 3787 | 1606 | 3011 |
| 2016 | 255034 | 111963 | 52020 | 72055 | 23440 | 16460 | 14753 | 3542 | 2272 | 2851 |
| 2017 | 182664 | 214142 | 77383 | 32021 | 39517 | 14131 | 9589 | 8098 | 1999 | 3096 |
| 2018 | 150206 | 153521 | 167461 | 52615 | 20621 | 21486 | 8473 | 5692 | 4655 | 3037 |
| 2019 | 282981 | 128117 | 104986 | 109119 | 31451 | 12136 | 11297 | 4738 | 3134 | 4317 |
| 2020 | 134456 | 238192 | 93866 | 70597 | 65860 | 18028 | 7218 | 6247 | 2705 | 4352 |
| 2021 | 160308 | 104459 | 179254 | 65080 | 43260 | 37343 | 10105 | 4272 | 3586 | 4172 |
| 2022 | 151027 | 128736 | 84583 | 116518 | 41157 | 24368 | 19457 | 5245 | 2312 | 4347 |
| 2023 | 62544 | 109619 | 95803 | 57125 | 64388 | 22966 | 13617 | 10319 | 2851 | 3667 |
| 2024 | 162746 | 45278 | 73015 | 58083 | 30816 | 31181 | 11748 | 6925 | 5302 | 3363 |
| 2025 | 216373 | 134969 | 31970 | 40002 | 29433 | 15126 | 15174 | 5951 | 3513 | 4454 |
| pred | 164865 | 88620 | 18771 | 21439 | 15532 | 8360 | 8386 | 3289 | 4403 | |